Analysis of atomization characteristics and efficient synthesis of Mg(OH)2 in micron scale atomization reactor

Abstract

Utilizing magnesium chloride (MgCl2) in the ammonia method to prepare magnesium hydroxide (MH) flame retardant products holds significant importance. This study introduces a novel approach for MH preparation, leveraging atomization technology to enhance the ammonia method. An experimental device for atomization-enhanced MH synthesis was developed. Atomization technology alters the reaction scale of the original reactor, generating microscale droplets that diminish the macroscopic reaction scale to the microscale. Computational fluid dynamics simulations demonstrate that adjusting gas and liquid supply pressures effectively enhances atomization performance. Optimal atomization is achieved at a gas supply pressure of 0.3 MPa and liquid supply flow rate of 60 l/h, producing micrometer-level droplets. Experimental results reveal sharp x-ray diffraction diffraction peaks in the transformed MH product, exhibiting a smooth substrate, high intensity, absence of impurities, and high purity. The MH conversion rate peaks at 76.2%. This study pioneers a novel avenue for future nanomaterial reactor development.